August kulbrock



S E m a R U RF fl P. R S A .3 AB R. l P m d 0 M 0 W No. 508,950.Patented Nov. 21-, 18913.

five'nzar KzZZroo/p UNITED STATES PATENT ()EEICE.

AUGUST KULBROOK, OF BERLIN, GERMANY.

FIRE-BAR FOR FURNACES.

SPECIFICATION forming; part of Letters Patent No. 508,950, datedNovember 21, 1893;

' Application filed December 1'7, 1892. Serial No.455,471- (No model.)

To all whom it may concern.-

Be it known that I, A GUST KULBROCK, of 21 Barutherstrasse, Berlin, inthe Kingdom of Prussia and German Empire, have invented a new and usefulImproved Fire-Bar for Furnaces, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to fire bars such as are used in boiler andsimilar furnaces and its object is to enable the burned or otherwisesimilarly damaged parts of such fire bars to be easily replaced withoutreplacing the whole bar.

In the accompanying drawings reference to which is hereinafter made,Figures 1 and 2 show respectively inside elevation and crosssection-part of a fire bar with my removable cogs or projectionsattached thereto. Fig. 3 illustrates in plan the fire bars shown inFigs. 1 and 2, the cogs however being removed.

In the construction illustrated by the figures, the fire bar a isprovided on its upper side with a dovetailed longitudinal slot 1) whichis closed at one end, and into which the cogs c are fitted. The cogs areof any desired shape and are furnished with dovetailed projections orfeet (1 which fit within the longitudinal slot. They are introduced intothe slot at one end of the bar and are passed along until stopped by thescrew or rivet e at the I other end.

For properly spacing the cogs or projections I provide a series ofinverted wedge shaped spacing blocks fitted to said channel and havingtheir projecting inclined faces in contact with the inclined walls ofthe projecting cogs. If desired each cog may be separately secured inplace by a rivet bolt or screw g, which may be withdrawn when it isdesired to remove the cogs or projections. Any other sectional shape maybe given to the-longitudinal slot which will prevent the cogs beingvertically withdrawn. It is thus evident that the removable cogs can notaccidentally drop out, but yet may be easily removed and replaced whendesired, any part of the bar being removedat will. j

' What I claim, and desire to secure-by Letters Patent of the UnitedStates, is

In combination with the grate bars u. having a longitudinal dove tailchannel in its upper face, a series of removable projections havingdove-tailed lower ends adapted to said channel, and inverted wedgeshaped spacing blocks fitted to said channel and having their projectinginclined faces in contact with the inclined walls'ot the projections a,substantially as described. ,p

In witness whereof I have hereunto set my hand in presence of twowitnesses.

AUGUST .KULBEooK.

Witnesses:

PAUL FIscHEE, W. H. EDWARDS.

